Brazing and welding compound and method of preparing same



UNITED STATES PATENT OFFICE.

J'OZEF KLEIN, OF NEW YORK, N. Y. BRA-ZINC!- AN'D WELDING COMPOUND AND METHOD OF PREPARING SAME.

Specification of Letters Patent. Patented Aug, 1'7, 1920,

1920. Serial No. 391,497.

No Drawing. Application illed June 24,

molten to thoroughly mix the ingredients. After again cooling, the mixture is then round up with about a quarter pound of iron filings. The amount of compound thus prepared is sufiicient to cover about thirty two square inches of metal surface.

To use my improved compound, the ends of the metal surface to be welded or brazed having been properly shaped as by making a scarf joint there, the parts heated to a cherry red, the compound is applied and then united in the usual manner.

\Vhat I claim is:

1. The method of preparing a compound for use in uniting metals consisting of slaking one part of quick lime in half its weight of water, adding a small quantity of sand, spreading four parts of melted borax flat on a warm steel plate, spreading the dried mixture of slaked lime and sand on the melted borax, cooling and removing the resulting compound rom the plate, melting the compound, then again cooling and rinding and mixing with one part of iron fi ings.

2. The method of preparing a compound for use in unitin metals, consi ting of spreading melted To all whom it may concern:

Be it known that I, Joznr KLEIN, citizen of Hungary, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements Brazing and Welding Compounds and Methods of Preparing Same, of which the following is a specification.

This invention relates to brazing and welding compounds and has for its object the provision of a compound which is effective to unite metal objects, especially parts made of steel, so firmly that the weld or brazed joint is often stronger than the solid metal.

A further object of this invention is the provision of a satisfactory method for makin said compound.

0 attain the above and other objects, I employ the compound pre ared and used as describedhereinafter. y improved compound consists of the following ingredients mixed .in the manner described and substantially in the proportions stated.

To somewhat less than an eighth of a pound of water, I add a quarter of a pound of quick lime in small quantities at a time until the entire amount of lime is used. then prefer to add a small uantity of sand to make up three-eighths o a pound total weight, though the sand may be omitted without greatly reducing the efiectiveness of the composition. The resulting mixture, after being dried, is then broken up and ground into powdered form. A pound of borax is then melted and cured on to a flat warm steel plate, on whic the melted borax is spread out evenl and flat, as for instance by means of a at wooden block. The owdered slaked lime and sand mixture is then sprinkled over the borax and the whole allowed to cool. a

After removal from the plate the mixture of borax, lime and sand is heated until orax on a warm steel plate, sprinkling slaked lime thereon, coolmg and removing the resulting compound from said plate, melting the compound, again cooling and grinding, and finally mixing with iron filings.

3. A compound for use in uniting metals comprising one part of quick lime, one-half part of water, four parts of borax, and one part of iron filings.

4. A compound for use in unitin metals com rising one art of quick lime s aked in onealf part of water, a small quantity of sand, four parts of borax and one part of iron filings.

In testimony signature this 23rd day whereof I have aflixed my of June, 1920. JOZEF KLEIN. 

